We don't recommend seasoning the mould in the oven prior to use. This action may change the colour of the mould.
Before use, wipe the mould with cloth (cotton recommended) using a little bit of oil (High smoke point oil recommended).
After use, try to avoid washing with water, but if necessary, use a soft sponge and do not use detergent. Wash for less than 30 seconds. Dry immediately.
Because it's 100% copper, discoloration due to heat and oxidation over time is normal.
Delivered very quickly and they work great! They were well packaged as well and arrived safely. Every bit as good as the 20 euro moulds from France; I highly recommend them.